Build Android for Raspberry Pi3

Getting Started

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To get started with building Android from source, you'll need to get familiar with Establishing a build environment.

Sync Android Source (AOSP)

• $ repo init -u https://github.com/tab-pi/platform_manifest -b nougat
• $ repo sync

Build Kernel

• Install gcc-arm-linux-gnueabihf (For Ubuntu: $ sudo apt install gcc-arm-linux-gnueabihf)
• $ cd kernel/rpi
• $ ARCH=arm scripts/kconfig/merge_config.sh arch/arm/configs/bcm2709_defconfig android/configs/android-base.cfg android/configs/android-recommended.cfg
• $ ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- make zImage
• $ ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- make dtbs

Install python mako module

sudo apt-get install python-mako

Build Android source

• $ source build/envsetup.sh
• $ lunch rpi3-eng
• $ make ramdisk systemimage

Help for build failure :

https://github.com/tab-pi/device_brcm_rpi3/wiki/Build-Errors

Prepare SD card

Partitions of the card should be set-up like following:

1. p1 512MB for BOOT : Do fdisk : W95 FAT32(LBA) & Bootable, mkfs.vfat
2. p2 1024MB for /system : Do fdisk, new primary partition, mkfs.ext4
3. p3 512MB for /cache : Do fdisk, mkfs.ext4
4. p4 remainings for /data : Do fdisk, mkfs.ex4
5. Set volume label for each partition - system, cache, userdata : use -L option of mkfs.ext4, e2label command, or -n option of mkfs.vfat

Write system partition

• $ cd out/target/product/rpi3
• $ sudo dd if=system.img of=/dev/ bs=1M

Copy kernel & ramdisk to BOOT partition

• device/brcm/rpi3/boot/* to p1:/
• kernel/rpi/arch/arm/boot/zImage to p1:/
• kernel/rpi/arch/arm/boot/dts/bcm2710-rpi-3-b.dtb to p1:/
• kernel/rpi/arch/arm/boot/dts/overlays/vc4-kms-v3d.dtbo to p1:/overlays/vc4-kms-v3d.dtbo
• out/target/product/rpi3/ramdisk.img to p1:/

HDMI_MODE : If DVI monitor does not work, try followings for p1:/config.txt

hdmi_group=2

hdmi_mode=85

How to set up Android-TV launcher :

https://github.com/tab-pi/device_brcm_rpi3/wiki#how-to-apply-android-tv-leanback-launcher

Graphics HAL of this build : https://github.com/anholt/mesa/wiki/VC4